iTunes 10 for Mac: Create a mix using iTunes DJ

iTunes can create a playlist of random songs from your library or a playlist. An iTunes DJ playlist continually updates itself (it’s a “live mix”), and you can edit it at any time.

While you’re playing an iTunes DJ mix, you can use the Remote app on your iPod touch, iPhone, or iPad to request songs. You can also allow guests to request songs to play and to vote on songs. Voting affects when and whether a song plays.